Polycarbonate resin composition with increased gamma-radiation resistant property and molded article using the same

Patent metadata

Field	Value
Publication number	US-9458308-B1
Application number	US-201514709533-A
Country	US
Kind code	B1
Filing date	May 12, 2015
Priority date	May 12, 2015
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

Disclosed are a polycarbonate resin composition as a polycarbonate material for medical use having yellowing resistant property with respect to the irradiation of gamma-radiation, which exhibits extremely little yellowing during sterilizing using the gamma-radiation, maintains transparency and has no mechanical change, and a molded article using the same. The present invention provides a polycarbonate resin composition including a polycarbonate resin, a thioether-based stabilizer and an amide-based stabilizer, and a molded article using the same.

First claim

What is claimed is:

1. polycarbonate resin composition, consisting of:
96 to 99.8 wt % of a polycarbonate resin;
0.1 to 2 wt % of a thioether-based stabilizer, the thioether-based stabilizer represented by the Formula 1,
[R(1)-S—R(2)] n -X, wherein,  [Formula 1]

each of R(1) and R(2) independently represents a substituted or unsubstituted carboxylic or heterocyclic aromatic ring, hydroxyl substituted phenylene or naphthalene, an alkyl group with 1 to 20 carbon atoms or a phenyl group,
n is an integer of 1 to 4, and
X is an alkyl group with 1 to 5 carbon atoms, an aromatic or nonaromatic ring, oxygen (O), nitrogen (N), phosphor (P) or sulfur (S); and

0.1 to 2 wt % of an amide-based stabilizer, the amide-based stabilizer represented by the Formula 2,

wherein,
each of R(3) and R(4) independently represents a substituted or unsubstituted carboxylic or heterocyclic aromatic ring, hydroxyl substituted phenylene or naphthalene, an alkyl group with 1 to 20 carbon atoms or a phenyl group,
m is an integer of 1 to 2,
when m is 1, Y is a substituted or unsubstituted carboxylic or heterocyclic aromatic ring, hydroxyl substituted phenylene or naphthalene, an alkyl with 1 to 20 carbon atoms or a phenyl group, and
when m is 2, Y is an alkyl group with 1 to 10 carbon atoms, a nonaromatic ring or an aromatic ring,

wherein the polycarbonate resin composition prevents changing yellow and lowering clarity by irradiation of gamma-radiation.

2. The polycarbonate resin composition of claim 1 , wherein a weight average molecular weight of the polycarbonate resin is 2,000 to 200,000.

3. The polycarbonate resin composition of claim 1 , wherein the thioether-based stabilizer is at least one selected from the group consisting of propanoic acid, 3-(dodecylthio)-1,1′-[2,2-bis[[3-(dodecylthio)-1-oxopropoxy]methyl]-1,3-propanediyl] ester, 2,2-bis[[3-(dodecylthio)-1-oxopropoxy]methyl]propane-1,3-diyl bis[3-(dodecylthio)propionate], and tetrakis[methylene-3-(dodecylthio)propionate]-methane, pentaerythritol tetrakis(dodecylthiopropionate).

4. The polycarbonate resin composition of claim 1 , wherein the amide-based stabilizer is N,N′-ethylenedi(stearamide).

5. molded article molded from the polycarbonate resin composition of claim 1 .

Assignees

• Lotte Chemical Corp

Inventors

• Park Young Kwan
• Lim Byung Hoon
• Kim Jin Ho
• Jang Byoung Ok

Classifications

• C08K5/20

  Carboxylic acid amides · CPC title

• C08K5/36 Primary

  Sulfur-, selenium-, or tellurium-containing compounds {(C08K5/0091 takes precedence)} · CPC title